Issn (Online): 2455

4.
 
THE PERFORMANCE OF THE 
FURNACE BLOCK 
The operating parameters of pyrolysis furnaces 
in a particular ethylene production are determined by 
the need for ethylene and propylene. After putting 
ethylene plants into operation, as a rule, they evaluate 
the compliance of design parameters of furnace blocks 
with actual ones. At the same time, during the pyrolysis 
of raw materials typical for a particular production, the 
optimal process parameters are determined that make it 
possible to obtain target products in predetermined 
ratios and reveal the balances of raw material 
decomposition. For this purpose, technological and 
thermotechnical tests of furnace blocks are carried out. 
 
Methodology for determining indicators. 
Using 
sampling systems in which fractional condensation of 
hydrocarbons 
С
5 and higher is carried out, the material 
balance of decomposition of the processed raw 
materials is determined. 
The composition of the products of the 
pyrolysis of hydrocarbon raw materials is determined 
by the analysis of samples of the vapor-gas mixture, 
while analyzing its gaseous and liquid hydrocarbon 
parts. 
Samples are taken using an outlet welded to 
the vertical section of the pyrogas pipeline after a ZIA 
with a slope of 10 ° to prevent condensate from flowing 
back into the pipeline. A sampling tube is connected to 
the branch, which reaches the middle of the pipeline; 
the inlet of the tube is beveled 15 ° and this part is 
turned to the side in the opposite direction of flow. The 
tube is equipped with a valve system that allows it to be 
inserted during operation. An in-line or temporary 
sampling system is connected to the sampling tube. 
A typical sampling system is shown in the 
figure. 

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